Most Helpful Guy
Just stay friends and build some trust, flirt back and see where it leads. If you flirt but it doesn't lead anywhere, you'll still be friends, or maybe it does and your happy. But if he does see you as just a friend, he might feel awkward with you if you tell him straight out, so just flirt and see where it leads.
Most Helpful Girl
I think you should take a chance. Admit your feelings.